Your mother's nephew's would be your first cousin. Sexual intercourse is discouraged due to the close blood ties between these family members. There is a significant risk of developmental anomalies occurring in the offspring of such a union.
While 1st cousins have married and had normal offspring; the statistical data shows that there is a disproportionate number of either geniuses and/or idiots born to couple who have intermarried. The studies were derived from data collected from small closed societies.
The baby can be smaller then it should and the risk for asthma is bigger.
brother
Yes, there are reports that say that HIV positive mothers who are breastfeeding will reduce the risk of the baby contracting HIV.
Because the baby has a high risk of dying inside the others vagina and the baby does not grow in the mothers belly it is grown in the vagina.
Your nephew's baby would be your grand-nephew or grand-niece. You would be their grand-uncle or grand-aunt.
The child of your nephew is your great nephew (if a son) or your great niece (if a daughter).
Your mothers niece is your first cousin. Your first cousin's child is your first cousin, once removed.
Your sister's son is your nephew and you are their aunt or uncle. Their baby would be your great nephew. Some use the term grandnephew, but great is more accurate.
The entire pregnancy. Every moment until the baby is born, that baby is developing. He/she is always at risk from the mothers decision to use alcohol or drugs
They are first cousins once removed.
if she has a boy, then its a nephew. its she has a girl its a niece.
Your nephew's daughter is your great niece. Her child is your great great niece or great great nephew.